Power device.



M. C. WHITE & 0. G. DURYBA.

POWER DEVICE.

7 APPLICATION I'ILBD 13110.28, 1911.

1,033,505. v Patgnted Ju1j23,1912.

4 SHEETS-SHEET l.

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M. 0. WHITE & O. G. DURYEA.

POWER DEVICE.

APPLIOATIQN FILED 111:0. 2a, 1911. 1,033,505. Patented July 23, 1912.

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34/11/117 1.. 1.x. u N 1 1 .M 7t z wa wvw Hi '1 o '1" M I i 1' g H Q l' l I H M. 0. WHITE & O. G. DURYEA.

POWER DEVICE.

APPLICATION FILED 1330.26, 1911.

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M. 0. WHITE & 0. C. DURYEA. POWER DEVICE.

APPLIOATIOH FILED DBO. 2a, 1911.

1,033,505. Patented July 23,1912.

4 SHEETS-SHEET 4.

- UNITED sTA-T s PATENT op nion,

MonnIs 0. WHITE AND orno c. war or cnlcaeo, ILLINOIS.

rowan DEVICE.

To all whom it may concern Be it known that we, Monms C. WHITE and OTI-IO C. .DURYEA, citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Power Devices ,.of which the following is a specification.

Our object is to provide an internal-combustion power-device of simple and improved construction adapting it, more especially, for

compressors and compressed-air lines to bev actuated, primarily, by the force of the com.- pressed air and to supplement said force by carbureting the air as it enters the cylinder of the device, then trapping and exploding the mixture in the cylinder to operate, or complete the operation of, the work-performing member in each instance; 7 i

In the accompanying drawings, we show our improvements, in one desirable form, applied to a power-riveter.

Referring to the drawings-Figure 1 is a. view of the riveter partly in elevation and partly in section; Fig. 2, an enlarged broken sectional view showing the valve and attendant moving parts in initial position, the same as in Fig. 1; Fig. 3, a partly sectional plan view, the section being taken on line 3- in Fig. 2; Figs. 4 and 5, views corresponding.

with Fig. 3, but showing moving parts in difierent positions; 'Fig. 6, a plan section taken on irregular line 6, 6 in Fig. 1;- and Fig. 7,-an enlarged section takenon line 7 in Fig. 6.

On the lower fork of the yoke-frame 10 is an anvil 11, and in the upper fork is an opening fitted with a cylindrical liner 12 in which works a stem or holder 13 carrying the riveting tool, or work-performing member, 14. Bolted upon the yokeis acylinder 15 fitted with a piston 16. The stem 13 is fastened to the piston by means of a pin 17 and the piston is held normally retracted by a return-spring 18. cylinder is closed by a cylinder-head 19 secured in place by bolts. The innerface of the cylinder-head 19 presents a concave sur- The upper end of the.

face 20 and the piston 16 presents a convex surface conforming theretooand contacting therewith when the piston is retracted. At

the center of the. cylinder-head'is an inletopening 21 and at one side thereof is a chamber 22, the inlet and chamber being joined by a shallow groove 23 in the face 20. The

Specification of Letters Patent. Patnted July 23,1912,

outer face of the cylinder-head presents a flat face 24 forming a seat on which is bolted a sparking-device or electric i'gniter 25 which extends into the chamber 22. Also bolted upon the face 24 is a valve-chest 26. In the cylinder-head is a chamber or' passage 27 communicating near one end with a coin-- pressed-air pipe-line 28 extending thereto from an air-compressor or compressed-air supplier, not shown. Extending from the opposite end-portion of the passage 27 is a pipe 29, and secured to thecylinder 15 is a bracket 30 extending parallel with the pipe 29. Screwed into the end-portion of the pipe '29 is a tube 31 passing toward its opposite endortion through an opening in the bracket 30.

I The numeral'32 designates a tank for holding gasolene' or other liquid, and suitable volatile, hydrocarbon. The top-wall of the tank forms a sleeve 33 fitting closely around the tube 31, whereby the tank is supported to swing in the vertical plane. At one end the sleeve 33 flares slightly and-is fitted with a soft metal gasket or bearing-face 34, bearing against a similarly-flaring surface on the tube 31; and at its opposite end the sleeve 33 is fitted with a stuffing-box, the nut-35 of which turns upon a threadedsection of the the tube 31' has an outer annular groove or 'channel 36 communicating with the interior is a tube 41 normally closed at its lower end.

by a ball, or check, valve 42. In the inclined face of the tube 31, against which the bearing-face 34 of the sleeve seats, is an annular groove or channel 43 from which extends the passage 44, The passage 44 terates in a tapering spray-outlet or. nozzle tube 31. At about midway between its ends 4.5, which is governed by a needle-valve 46 nozzle 45.

ing 51 of the valve-chest 26. The valve chest chamber 52 'is cylindrical and pro-- vided with a liner 53. In the liner is an annular series of inlet-ports 54: surrounded by a channel communicating with the inlet-passage 51; an annular series of ports 56 communic'ating'with a surrounding channel 57 leading to the cylinder-port 21; and an annular series of exhaust-ports 58 communicating, through a surrounding channel 59, with the exhaust-outlet 60. Fitting and sliding in the liner 53 is a spool-valve 61 formed with the three rings. or pistons. 62, 63 and 64:, in the relative positions shown. The spool-valve is hollow and toward one end is provided at opposite sides with elongated slots 65. In the said end is a looselyfitting plug 66 held stationary by means of a pin. 67 passing through the wall of the valve-chest and through the slots in the spool-valve; In the spool-valve and confined between a closed end 68 thereof and the plug 66 is a spring 69- which tends normally to maintain the spool-valve inthe position indicated in Figs. 1, 2 and 3.

Secured against the end of the valvechest 26 is a chamber or casing 70 containing a solenoid or spool-magnet 71 having a core 72. Extending through the core isfla stem 73 carrying an armature 74. On the armature is a threaded boss 75 which is screwed into the end of the spool-valve 61, thereby securing the latter to the armature 74 and its. stem. On the end of the casing 70 is a chamber or casing 7 6 forming 9. cylinder for a piston 77 carried by the stem 73. The cylinder v76 is provided in the positions shown with vent-openings 78, an outlet-opening 79 and an inlet-opening 80. The outlet-opening 79 is normally closed by a spring-pressed ball, or check-valve, 81 and the opening is governed by a needle-valve 82. The numeral 83 designates the mains of an electric circuit one of which terminates at the yoke 10 or any other stationary metallic part of 'the frame. One branch 84 of the other main extends to a binding-post 85 on the igniter or spark-plug 25, and another branch 86 thereof extends to the terminal or binding-post 87 of the solenoid magnet. In the branch 86 is a switch 88 of any suitable form and which, in practice, may be of the well-known push-button type.

The spark-plug 25 has a stationary contact 89, connected with the binding-post 85,

and aswinging contact 90 carried by a rockshaft 91. .On the rock-shaft 91 is a spring 92, which tends normally to turn the shaft in its bearing to cause the contact 90 to engage the contact 89; and also on the rock shaft is a disk 93 havinga notch 94 and a flat surface or shoulder 95. The notch 94 on the disk, when the contacts 89, 90 are closed, is in the path of a finger-extension 96 of the spool-valve 61, and in the movement of I the latter from the position shown in Fig. 5 to that shown in Fig. 3, the finger 96 first engages the notch 94,- then swings the disk to break the contacts 89, 90 and then slides along the shoulder to hold the said contacts open.

In practlce, compressed-air from the.

pipe-line 28 moves into, the passage 27 around the cylinder 15 and thence through the pipe 29 to the tube 31. The pipe-line air enters through the openings 37.

channel 36 and opening 38 to the-interior of the fuel-tank 32, to maintain the same at pipe-line pressure. From the tube 31 the air passes through the tapering outlet 49 across the end of the spray-tube or carbuno current from the pipe-line to the cylin- Thus while the device is inactive no air escapes from the pipe-line andno fuel 'or electric current isconsumed. r

der.

For the purpose 'of operatin the device to set a rivet,-the operator simp v closes the switch 88, causing current to flow to the solenoid. Immediately that the magnet 71 is excited the armature 74 is drawn into contact with the core 72, shittingl the spoolvalve and; attendant parts to e position shown in Fig. 5. In t 1s movement the iston 77 travels to the right in Fig. 2, is-

charging air from the cylinder 76 through v I the ort 79, the check-valve ofwhich opens free y. In this movement, furthermore, the finger 96 disengages the disk 93, permitting the contacts 90, 89 of the spark-plug to be closed by the spring 92. This movement of the spool-valve to the position shown in Fig. 5 establishes communication between the inlet-port or ports 54 and the port or ports 56 leading to the cylinder. All the air entering from the pipe-line 28 and passing the carbureter 45, as explained, becomes suitably carbureted to produce the desired explosive mixture, and the first of said mixture entering thecylinder 15, while theplston 16 is retracted as shown in Fig. 1,passes through the groove or channel 23 to the chamber 22. Simultaneously therewith the piston.commences to move downward, so that the first portion of the charge sweeps the chamber 22 of any remnants of a former exploded charge. The operator holds the Ill switch 88 closed while the pressure entering the cylinder 15 moves the piston until the work-performing member 14 comes into contact with the rivet to be set. He then opens the switch 88, to shut ofi the currentto the solenoid, causing the armature 74 to be released and permit the spring 69 toove it and the spool-valve to and beyo d the position shown in Fig. 4 -to the position shown in Figs. 1, 2 and 3. Thus, as soon as the piston-portion 63 of the spool-valve crosses and blanks the port 54, to shut oilfurther supply of mixture to the cylinder, the finger 96 engages the notch 94 of the disk 93, and starts turning the same against\ the resistance of the-spring 92 to separate the sparker-contacts 89, 90. This produces a spark, to ignite the charge in the cylinder, causing an explosion which drives the piston outward and causes the work-perform ing member to set the rivet under the force of the explosion. Immediately after the ex plosion the piston 64 of the spool-valve crosses the port 58, thus opening the port 56 thereto and causin the cylinder to exhaust, at which time t e parts come to rest ready for another operation. The speed of movement of the spool-valve fromthe position shown in Fig. 5 to that shown in Figs'. 1, 2 and 3 is governed, by theentrance of air through'the port to overcome the relative vacuum in the cylinder 76 as its. piston 77 is moved under the,force of the spring 69. This is controlled by the needlevalve 82 which maybe set to permit air to enter through the port 80 and cause the spool-valve to be moved at the speed desired to give the roper time between the explosion in and the exhaust from the cylinder 15.

Our improved device operates very rapidly and can be employed to set rivets, for example,.as fast as it is possible to position the work in the device. The compressed air, passing from the pipe 28 to the carbureter, by sweeping around the cylinder 15 tends to keep the same from becoming overheated, and the warming effect upon the air aids in the carbureting thereof as it sweeps through the carbureter. It is quite common to' mountthe yoke-frame of a riveter in a bail 95, as shown, so that it may swung to difierent angles in the vertical plane. In the present device the fuel-tank turns readily upon its support, so that it will remain upright in any position of the yoke. g

The foregoing description is intended to convey a clear understanding of our improvements in what we now believe to be the best form of their embodiment, and no undue limitation should be understood therefrom. It is pur intention to claim all that is novel in our invention, and that the claims shall be construed as broadly as the 'charge-in the cylinder and then to ex prior state of the artmay warrant.

' What we claim as new, and desire to secure by Letters-Patent, is.'- 1.. The combination with a compressedair conduit, of means for carbureting the air to produce an explosive mixture under pressure, a power-device, of the character described, having. acylinder and piston, forming arts movable one with relation :to the other, a work-performing member operatively connected with the moving part, an igniter in the cylinder, valve-mechanism interposed between the conduit and cylinfder, movable to direct {the mixture under pressure to the cylinder against the piston, thereby to advance -"the work-performing member against the work, then to tra' the iiaust the cylinder, and igniter-actuating means cooperating with the valve-mechanism to explode the charge while the same is trapped.

2. The combination with a compressed-air conduit, of means for carbureting the air to produce an explosive mixture under pressure, a. power-device of the character described, having acylinder and piston, form- ,ing parts movable one with relation to the other, a work-performing member operatively connected with the moving part,an

igniter in thecylinder, and igniter-actuating valve-mechanism, v interposed bet-ween the conduit and cylinder, movable to direct the mixture under pressure to the cylinder against the piston, thereby to advance the work performingmember against the work, then to trap and explode the charge in the cylinder and then to exhaust the cylinder.

3. The combination with a compressedair conduit, of means for carburetingthe' air to produce an explosive mixture under pressure, a power-device of the character described, having a cylinder and piston forming parts movable one with relation to the other, a work-performing member operatively connected with the moving part, an igniter in the cylinder, valve-mechanism interposed between the conduit and cylinder, manually-controlled means for moving the valve-mechanism to an advanced position to direct the mixture under pressure to the cylinder, automatic-returning means for the valve-mechanism, operating to first close communication with the conduit, to trap the charge in the cylinder, and then to exhaust the cylinder, and igniter-actuating means cooperating 'with the, valve-mechanism, to explode the charge while the same is trapped.

4. In a power-device of the character described, the combination with a piston and cylinder and a compressed explosive-mixture supplying conduit for the cylinder of valvemechanism interposed between the conduit and cylinder, operating when moved to one position to open communication between the said conduit and cylinder and in a single progressive return movement, from said position, to first close said communication, to trap thechargc in the cylinder, and then open the cylinder-exhaust, an igniter in the cylinder, ignitcr-actuating means, cooperating with the valve-mechanism, to explode the charge While the same is trapped, and means controlling the speed of saidret'drn movement of the valve-mechanism.

5. In a power-device of the character described, the combination with a. piston and cylinder and a compressed explosive-mixture supplying conduit for the cylinder, of valve mcchanism, interposed between the conduit and cylinder, manually-controlled means for moving the valve-mechanism to one position, to open communication between said. conduit and cylinder, means operating, when the valve-mechanism is released by said manually-controlled means, to return the valve-mechanism to first close said communication, to trap the charge in the cylinder and then open the cylinder-exhaust, an igniter in the cylinder, and igniter-actuating means, cooperating with the valvemechanism, to explode the charge while the same is trapped.

6. In a power-device of the character described, the combination with a piston and cylinder and a compressed explosive-mixture supplying conduit, of valve mechanism interposed. between the conduit and cylinder, a normally open electric circuit with means for closing it, avalve-shifting solenoid in said circult, operating when the clrcult is closed to move the valve-mechanism to one position, to open communication between said conduit and cylinder, and means-operating, when said circuit is opened, to return the valve-mechanism to first close said com munication, to trap the charge in the cylinder, and then open the cylinder-exhaust,.an

igniter in the cylinder, and igniter-actuating means cooperating with the valve-mechanism, to explode the charge While the same is trapped. i i

7. In combination with a compressed-air conduit, a power-device of the character described and movable to dltferent angles 1I1 the 'vertical plane, having a compressed-air passage communlcating with sald cond'ult, a

swinging liquid-fuel holder, a fuel-supply tube extending from said holder'to said passage to carburet the compressed air therein, a cyllndcr' and piston, an i'gniter 1n the cylinder, valve-mechanism, interposed between the conduit and cylinder, movable to direct the mixture under pressure agalnst the piston, then to trap the charge in the cylinder, and then to exhaust the cylinder, and igniter-actuating means operating to" explode the charge While the same is trapped.

MORRIS C. \VHITE. OTHO C. DURYEA. In presence of- R. A. RAYMOND, O. C. Avisus. 

